[UNIX] QNX Neutrino RTOS su and passwd Command Buffer Overflow
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- Date: 9 Feb 2006 15:17:41 +0200
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QNX Neutrino RTOS su and passwd Command Buffer Overflow
------------------------------------------------------------------------
SUMMARY
<http://www.qnx.com/products/rtos/> NX Software Systems Ltd.'s Neutrino
RTOS (QNX) is a real-time operating system designed for use in embedded
systems.
Any authenticated local attacker can exploit this vulnerability to gain
super-user (root) privileges on the affected system.
DETAILS
Vulnerable Systems:
* QNX Neutrino RTOS version 6.2.0
* All versions are suspected vulnerable.
Local exploitation of a buffer overflow in QNX Neutrino RTOS's (QNX) 'su'
/ 'passwd' command allows attackers to gain root privileges. The problem
specifically exists in the parsing of a long string passed as the first
argument to the set user id (setuid) binary 'su' / 'passwd'. A string
larger then approximately 4000 bytes causes a stack overflow directly
overwriting the stored return address and allowing an attacker to seize
CPU control and eventually execute arbitrary code under root privileges.
Workaround:
Clear the set user id or execute bits from the affected binary or remove
it entirely.
Disclosure Timeline:
06/04/2004 - Initial vendor notification
02/07/2006 - Public disclosure
ADDITIONAL INFORMATION
The information has been provided by iDefense.
The original article can be found at:
<http://www.idefense.com/intelligence/vulnerabilities/display.php?id=385>
http://www.idefense.com/intelligence/vulnerabilities/display.php?id=385
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